COAL-FIRED GENERATING STATION CCR POND CLOSURE ACTIVITIES
ENTACT has been engaged to perform pond closure, repurposing, and maintenance activities at this coal-fired power plant located along a major river system in the Midwest. Based on the successful completion of the East Bottom Ash Pond Closure, ENTACT was awarded additional work at the facility, as outlined below, on a competitive or sole-sourced basis. Highlighted projects include: West & East Bottom Ash Pond Repurposing, & Wastewater Pond Sediment Removal: The West Bottom Ash Pond (WBAP) is being closed by
FORMER MINE SITE PROCESS AREA RADIOLOGICAL REMEDIATION
ENTACT was engaged to perform comprehensive radiological remediation at a former copper mine site in the Rocky Mountains. This project involved the removal of radiologically impacted soil, asbestos pipe, and the capping of tailings in former evaporation ponds. All actions were executed in compliance with an EPA Administrative Order on Consent, ahead of schedule, and with a strong emphasis on worker health and safety, which impressed the EPA. The project included the following key activities: Evaporation Pond Closures: To facilitate
FORMER MGP SITE IN-SITU SOLIDIFICATION AND STABILIZATION
ENTACT completed site remedial work and in-situ solidification and stabilization (ISS) of impacted soils at an eight-acre former manufactured gas plant (MGP) site. The project was located near industrial, commercial, and residential properties, as well as community parking areas, a recreational park, and water district facilities, including water supply wells. This comprehensive remediation approach ensured the effective treatment of impacted soils while safeguarding surrounding properties and community resources. On this project, ENTACT: Excavated, transported, and disposed of 52,000 tons of
FORMER WOOD TREATING SITE CORRECTIVE MEASURES
ENTACT implemented corrective measures at a 52-acre former wood-treating facility that produced creosote-treated railroad crossties. This comprehensive remediation project aimed to contain contamination and restore the site for future use. For this project, ENTACT: Installed a 2,200 linear foot soil-bentonite slurry wall to a depth of 45 feet below surface grade to contain the source area and control groundwater migration Excavated and consolidated 17,000 cubic yards of polycyclic aromatic hydrocarbon and phenol-impacted surface soils, subsurface soils, and sediments Dewatered and
ACTIVE REFINERY EXPANSION RCRA CORRECTIVE ACTION
ENTACT performed remediation activities at a Gulf Coast refinery as part of a Resource Conservation and Recovery Act (RCRA) Corrective Action to address solidified F037 waste and oily sediments in preparation for constructing a new ethane cracker unit. Scope of work completed by ENTACT: Demolished and removed at-grade and below-grade structures Removed existing cover materials for segregation, stockpiling, and/or reuse as road or laydown area material or backfill at other areas of the refinery Dewatered existing water and managed water
PICKLE POND REMEDIATION AND HABITAT CONSTRUCTION
White Lake Dock & Dredge, a division of ENTACT, performed remedial activities at Pickle Pond, a nine-acre urban pond situated in the St. Louis River lower estuary. This project aimed to enhance the habitat for local wildlife, including waterfowl, beavers, and otters, while addressing sediment contamination. During this project, our team: Dredged more than 16,000 cubic yards of contaminated sediments composed of fine-grained silty clays Solidified dredged materials by applying a non-toxic super absorbent polymer to reduce excess water, allowing
LNG EXPORT TERMINAL GROUND IMPROVEMENT
ENTACT performed soil improvement activities at a 1,000-acre site in preparation for the development of a liquefied natural gas (LNG) export terminal. The project site is strategically located on a ship channel with direct access to the Gulf of Mexico, offering deep-water access, proximity to abundant gas supplies, and ease of transport for buyers. ENTACT successfully completed the work within a three-month timeframe, ensuring the site was prepared for further development. Our team: Improved 410,000 cubic yards of soft saturated
LNG LIQUEFACTION SOIL STABILIZATION
The Client’s project involved the expansion of a liquefied natural gas (LNG) terminal to accommodate three LNG trains, a gas pretreatment unit, and a dock. Prior to construction, the ground required reinforcement to support the complete turnkey LNG facility. ENTACT completed the project in 11 months, finishing ahead of schedule and within budget. Upon project completion, ENTACT had: Stabilized more than two million cubic yards of soft dredged sediment and fill soils Performed in-situ stabilization on timber mats and pneumatic
LNG EXPORT FACILITY SOIL IMPROVEMENT
In preparation for future construction at this liquefied natural gas (LNG) export facility, ENTACT improved the soil in the expansion area to facilitate equipment access and support the construction of perimeter storm protection and a levee system. ENTACT completed the ground improvement work within 10 months. For this project, ENTACT: Improved nearly two million cubic yards of soft saturated dredged clay Utilized Type I-II Portland cement to achieve a shear strength of 1,800 psf for the site raise area and
FORMER CHROMIUM ALLOY AND RADIOLOGICAL SUPERFUND SITE
ENTACT executed a four-phased remedial action project to support the decommissioning of a former glass and super alloy additives manufacturing facility. The site, due to historical metallurgical operations, exhibited metals and radiological contamination in soil and sediment both on-site and in adjacent areas, including wetlands, a stream channel, and wooded uplands. The project phases were designed to systematically address the impacted materials, as outlined below: Phases 1 and 2 Remediation: The initial phases focused on materials within the property limits.
CHEMICAL AND RADIOLOGICAL REMEDIATION
ENTACT is leading an extensive ecological restoration of more than 100 acres at a former industrial site that hosts several chemical manufacturers, a clay mining operation, and a disposal area for impacted soils and dredge spoils. The restoration plan aims to create a 14-acre open-water pond, 40 acres of wetland mitigation, 55 acres of upland enhancement, and nearly two miles of public walking trails and boardwalks. The project comprises multiple phases, detailed below: Phase 1: Sediment Remediation The initial phase
ACTIVE STEEL MILL CREEK AND DITCH PCB SEDIMENT REMOVAL
ENTACT partnered with our Client to implement a phased solution for the removal of PCB-impacted sediment and the restoration of the surrounding river and its environment for the benefit of the nearby community. The project involved comprehensive remediation efforts across 3,000 linear feet of ditch line and 5,600 linear feet of creek channel. ENTACT performed the following scope activities: Transported 178,500 tons of PCB-impacted sediment, clay, and native materials off-site for disposal Treated and filtered four billion gallons of water